Nut-lock.



No. 829309. PATENTED AUG. 21, 1906.

" EL HENRY & J. M. POWERS.

N UT LOOK.

APPLIGATION VE/VTORS FILED APR. 14, 1905.

F/ llV E5 FRANCIS M Wupg/ JOHN M. P0 R5 I BY flu! M M THE/R ATTORNEYS vof t e bolt, showing the flattened locking-suri Iran-TENT. oFrioE.

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. .n rseaece r I "rat oame April 14, 1905. Serial v4 'V v I l I vide theannular flange or ring 6 by .aws'er'ies '0 'aLbiU/umnit may concern: l f

f 1 Be "itfknown that we, FRANois HENRY nd' JoHN -POWERS, ofMinneapolis, Henepihco 'u'1t'y,.- llfinnesota, have invented certain;new and useful Improvements in Nut- Loo of which the'following is aspecifica- .The object of: our invention is to provide means fbrsecuringa nuton a bolt which will permit-the removal of the nut at anytimewithout the use of special tools.

A-further object is'to provide apinut-lock that will be simple andinexpensive to manufacture and one that will be strong and dura- He andeasily and [quickly manipulated to In the accompanying drawings, formingpart of this specification, Figure 1 1s a view of a bolt and nut,partially in section, showfiat surface of the bolt.

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ing the. position of the locking flange or ton es on the'nut. Fig.2is'asectional view face thereon. Fig. 3 is a similar view Show ing theflange pressed down upon the flat sur face of the bolt. Fig. 4 is asectional view showing a shoulder formed on one side of the Fig. 5illustrates a locking-tongue pressed down upon the shoul- Fig. 6 is anenlarged sectional view showing the manner of raisin the tongue from theflat surfaceby parti'a ly revolving the nut. Fig; 7 is a similar viewshowing the locking-tongue raised sufficiently to clear the shoulder onthe bolt.

In the drawings, 2 represents a bolt.'having threads 3 at one end and aflat surface 4, which on one side is rounded off and merges into thethreads of the bolt, the other side being left flat, as indicated inFig. 2.

5 represents a nut having a flange 6 on one side, that may be, of theform of a continuous ring extending around the bolt, as shown in Fig. 2.To look the nut, this ring is struck with a hammer or other tool and aportion of it forced down upon the flat surface, as shown.

in Fig. 3. We may prefer, however, to divide this flange into a seriesof tongues 7, that project from the nut and may be forced downindependently of one another upon the flat surface. These tongues may beformed in various Ways on the nut; but probably as economical a methodas any would be to di- 1, iiT-Look.

- I ratenteanu flai, 1906.

a-aanaof saw-cutss When one of these tongues has been-forced down uponthe fiat surface, "the nutwill besecurely locked. 1f, however, it isdesired to release the'nut, it is'tui'ned to ward the right, and thedepressed tongue following 'thecurved surfacewill ride up ontothethreads and be lifted sufficiently to clear the flat surface when thenut is turnedin the opposite direction." To insure the locking of 8 onthe flat surface thatwill be'i'n thepath of the locking-tongue andpositivelyprevent the nut from turning toward the left until the tonguehas been. raised sufficiently to clear the shoulder. When this shoulderis used, its corner may be beveled, as shown in Fig. 7, and a similarbevel may be provided on the edges ofthe ton being removed t e tonguewill ride over the shoulder without catching thereon, having previouslybeen raised oil the flat surface by use of this form of lock-nut withthe curved surface on the bolt merging into the threads permits us todispense with the use of all special tools usually required forunlocking nut-locks of this type. A track-walker or simply rotating thenut toward the-right can raise the tongue a sufficient-distance to clearthe flat surface or the shoulder and allow the nut to be removed fromthe bolt, or if it is merely necessary to tighten the nut the workmancan turn it toward the ri ht sufficiently to tighten it and then forceown another tongue upon the flat surface to lock the nut in its newposition.

. We claim as our invention 1. The combination with a bolt having athreaded end and a flat surface extending on said bolt across thethreads lengthwise of the bolt and in a plane substantially at rightangles to the radius of the'bolt, the threads on one side of said flatsurface gradually decreasing in depth as they approach said surface andfinally merging therein in a gradual curve and forming a convexcontinuation of said flat surface on one side thereof, of a nut havin anannular flangeon one end adapted to be orced down at any desired pointin its circumference upon said flat surface and lock said nut againstaccidental movement, the depressed portion of said flange being ralsedsufliciently by engagement with said convex surface when the nut isturned to tighten 1t es, so that when the nut is the rotation of the nuttoward the right. The

section-man with an ordinary wrench by the nut, we may prefer to providea shoulder" on the bolt to clear the said surface when the nut is turnedbackward to loosen it on the bolt whereby the nut can be locked on thebolt and tightened thereon to allow another portion of said annularflange to be forced down 11 on said flat surface or the nut removed omthe bolt without the use of special tools, substantially as described.

2. The combination, with a bolt, having a threaded end and a flatsurface extending on said bolt across the thread .len thwise of the boltand in a plane substantial at right angles to the'radius of the bolt, te threads on one side of said flat surface gradually decreasing in depthas the approach said surface and finally merging tlierein in a gradualcurve and forming a convex continuation of said flat surface on one sidethereof, 'said bolt being, provided on the opposite side of said surfacewith a low stop having a shoulder facing said surface and extendinglengthwise thereof on said bolt, of a nut having an annular flange onone end adaptedto be forced down at any desired point initscircumferenceupon said flat surface and lockjsaid nut against acciden tal movement,the depressed portion of said flange being raised sufiicientlybyengagement with said eonvex surface when the nut is turned to tighten iton the bolt to clear thesaid surface and the shoulder of said stop whenthe nut is turned backward to loosen it on' the bolt, whereby the nutcan be locked on the bolt and tightened thereon to allow another portionof said flange to be forced down upon said flat surface or the not re-;moved from the bolt without the use of

